You may be going through a more depressive, more angry, or just more emotional phase since you topped taking the anti-depressant last week. I read that happens to people - it's like a withdrawal.
I was prescribed tramadol and took it regularly for months, it acts as a pain killer and an anti-depressant apparently, and it messed me up for weeks after I stopped taking it. ::shudders::
I TOTALLY understand!! A professor I work with was complaining about how long it was taking for her sprained ankle to heal last week. I thought, "well, a brain takes a bit longer than that..."